View Single Post
Jul19-11, 01:19 PM
C. Spirit
Sci Advisor
WannabeNewton's Avatar
P: 5,619
Quote Quote by TrickyDicky View Post
What energy? How do you figure there is energy in a spacetime with no curvature (no gravity) and therefore vanishing stress-energy tensor? Not much to be conserved, right?
I think the point is that since the minkowski metric admits a time - like killing vector field, the energy conservation just follows regardless.